1980Final results
1980 election for Indiana Senate District 5
Indiana State Senate · Indiana
William Costas (R) won with 63.9% of the vote, defeating Ronald J. Miller (D) by 27.8 points.
William CostasRepublican · winner
63.9%31,698
Ronald J. MillerDemocrat
36.1%17,925
49,623 votes
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET
The seat over time
D − R margin in this seat's races around 1980
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET